How to Make a Watertight Wood Joint, Without Using Glue or Sealants

Frank Klausz reveals the "family secret" of creating a gasket effect

Unless you have experience with traditional boatbuilding or making traditional Japanese sake cups, you may not realize you can join two pieces of wood together--with no glue or sealant--in such a way as to make the joint watertight. Here master woodworker Frank Klausz reveals the trick taught to him by his grandfather, fabricating a helpful tool out of materials you probably have lying around:

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It is indeed a clever technique, exploiting the behavior of both wood and water, and this is the first time I've seen it demonstrated.

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